Windows Resize Event Delay

Currently it appears I dont see the RESIZED event until the main window resize drag is complete.

There's a note in the code here to explain it;

 /* NOTE: resizing the swap-chain during resize leads to a substantial
                   memory spike (hundreds of megabytes for a few seconds).

                if (_sapp_win32_update_dimensions()) {
                    #if defined(SOKOL_D3D11)
                    _sapp_d3d11_resize_default_render_target();
                    #endif
                    _sapp_win32_app_event(SAPP_EVENTTYPE_RESIZED);
                }
                break;
*/

Is this only a problem with D3D11?

I tried putting this code back in and my app now resizes smoothly and I'm not seeing a memory spike (win 10/ -DSOKOL_GLCORE33).

What is the backstory here. Older windows versions? Drivers?

Or is this something that can actually be put back in now?

thanks for any help and info.